Convertible cycle-motor.



L. s. N SH. I GGN VBBTIBLE CYCLE MOTOR. AQ ILIQA'TION FILED SEPT.28,1907.-

Patented on-4'; 1913.

2 sums-sum 1.

v INVENTOR LAWRENCE S. NASH.

WITNESSES.

'ATTOFQNEYS'.

L. s. NASH. GONVBRTIBLE CYCLE MOTOR. LPPLIOATIQH FILED SEPT. 26, 1907.

Patnted Nov. 4, 1913.

' WITNESSES: INVENTOR. LAWREND ESNASH.

AT-TORNEIYS.

an stares rarest WEE? it LAWnE-ncn SsNASI'I, or nn'rnorr, MICHIGAJ,essisnoit, BY vrnsnn h'ssrenmiiirrs, To omvnn MOTOR can 00., or DETROIT;MICHIGAN, A conroimrron or MICHIGAN;

CONVERTlBLE CYCLE-MOTOR.

hotness.

vertible Cycle-Motors of which the following is a specification,reference being had therein tothe accompanying drawings.

In automobile-and boat motors of the in ternal combustion" type, it isdesirable that the fuel supply heunder the operators control thatf'itmay-beregulated to. suit Work ing conditionsand variation of-load whilerunning and it is further advantageous to have the motor adapted-tabschanged from two-cycle, to four-cycle or the reverse," to

give furtiher range offaction which may more fullymeet the requirementsof service.

This invention relates to lnternal combus- 'tion niotorsa-nd especiallyto such engines;

provided with means whereby the mode of operationfof the engine may bedetermined and the engine made to work either upon a two-stroke or afour-stroke cycle, together with controlling mechanism. whereby thefuel'supply' be positively varied in ac cordance Witht-he engine load.

' The invention consists in the matters hereinafter set tenth;'anrl'more particularly pointed out in the appended claims.

' Referring to-the drawings, Figure l is a View in vertical sectiontransversely to the mainpshaft, or. an internal'combustion motorembodyingfeaturesof the invention.

? Fig. a VilBW in side elevation of the motorr Fig. '3 is a view-indetail of a pump ca1n., Fig. 4: 1 s a'vle v in section of a Iuel pumpand shift ng lever.

In the drawings, 1 representsa cylinder having an inlet'portQ, anexhaust port 3 above it, and a hy-pass 4 opposite-the ports, as usuallydisposed fora two-cycle motor. The cylinder is supported on a crank case5 which ::Eorn 1s an air compression chamber and a main shaft 6jour'naled therein operates apiston? through the usual crank 8 androd'E). Thepiston has a port 10 adapted to communicate with thelay-pass, the several' ports in the cylinder and piston being arrangedto. obtainxthe usual compression andscavengmgjoi', each revolut on ofthe engine.

The cylinder head '11 is preferably concaVe a-nd cooperates With-abalfle 12 on-the I Specification of Letters Patent.

[plunger horiuall preferred form, consists ota shu'ft 'Pateanted NW; 4,19 13.;

' Application fiIed September SwLIBOT. Serial iVaSSQBBZ. I l

piston head opposingtlhe outlets of'the -by pass to throw the incemingair from the bypass around the cy linder. An'aperture; 13 is-provided inthe cylinderhead for a spark plug, and the usual 'provisionsior coolingand lubricating are also s nplied, the details of actual construction.fol ing the usual lines of goo. d shop practice.

A vaporizing valve I casing-l4 is secured 1n; the upper part of thecylinder over the,

lay-pass outlet. A c irecti air passage 15 through the casing piped to asuitable-sup.- p ly of conipres'sed afirterminates in a jet nozzle 16"aclaptedto; project a spray into transversely into the passage near itscenterthrough an aperture (1 valve seat 8. A clo-; sure 19 is secured ou'a-sten'igQO a guide aperture in} a plut a nipple 22 in the easing andis seat by a spring 2 3, simultaneou both the passage 15 and tit soseated. Y

The vaporizing} seine isconnected by a pipe 24:, to the discharge of a.feedpump 25v mounted. suit albiy on the engine base The pinup, in itspreferred fornn consists ofa cylinder 26 *girith a solid plunger 2? reciprocahle therein through a shi table packing gland 28, a lqalihcheck29 at the foot of i the cylinder actii as an inlet valve; and a secondball-check: 32 inwardly seated-bye v spring 31, formii; a dischargevalvdripening into the pip; the lower end of the cylinder being pi peelto a suitable source of supply. The up per end of the plunger isconnected bya t eras-pin e8 to-a "lc'v'er t if'. pivoted at its on .terend to an extension 9,5 of the pump cash 1g, "transversely to t'heinainshaft, a longitudinal slot affording necessary play f1 tlhepiu, and'aspring between. the casing and level; holding-Abe stroke; i k

The pump operating mech hnisui. in its 36 "piirallel' to the main shaft,either Specially pro videcl or else the regular comuiutivtor shaft ofthe engineigrjitiousystem. :u'idin either case driven by the main shaftthrough suit-- Q able connections,isuch ails av gem} truiu 37,;at' halfthe engine speed. Ara-mi 38 is keyed to the sh'att over the pump lever:32 and may y at the upper end 11 bareqiprocatedlongitudinally betweensuitable stops 39 by a forked shifting lever 40 interlocking with.peripheral parallel flanges 41. The cam comprises twp parts, one part-42 depressing theipump lever32 in opposition to the spring 35 onceduring each revolution, and the other part 43 adapted to push it downtwice, the shifting lever 40 holdmg either one or the other'ca'msect1on-1n the desired operative relation "to the lever. The upwardmovement of the plun gel" determined by a stop 44 on a rock arnl .45pivoted to the casing and by which the stop may 'be manipulated. Whenanother source of air supply is not. available, an air pump 46. of anystandard, conventionalqtype, is operatively connected to' the cam shaft36, and piped to a pressure tank plied. I r

In operation, the cams are timed to momentarily depress the lever 32 andpump plunger at't he instant the piston has covered the by-pass and.exhaust port on its upstroke, thereby forcing the vaporizing valve openand injecting fuel which is projected by the compressedwair thussimultaneously released by the same closure '19 in a spray into thecylinder, the piston afterward com ance with thG'WOI'k to be donethrough the stroke-changing mechanism of the pump. ;--,45--' pressingthecharge which is then ignited as usual. The amount of fuel injected isdetermined'by the stroke allowed. the plunger by the manipulation of thelever stop flA'by the operator, who canlikewise shift the pump-cam" sothat the charge is injected either on each up stroke or onalternateones,

"therebymaking the engine in effect operate either on' the 'tfwo-cycleor four-cycleplan.

1 47 from the atomizing-valve'is sup-.

,Oneof' the chief features .of the invention is the economy in' fuelconsumption gained by the absolute control of the fuel supply by theoperator who can vary it in accord- Another feature is the efficiency ofthe motor whenrunning on the four-cycle plan,

because of the pure air twice forced through the cylinder, so that thereis complete scavenging while the internal cooling effect is greatlyincreased.

- v .under pressure; a vaporizing valve of any suitable design adaptedto be operated auto matically as shown may be substituted for 'riable.intermittent stroke to the plunger the preferred form described, and anymechanism which affords the properly timed vamay be used although theshifting cam and adaptability of the engine fordifferent fuels leverwith its stop are extremely simple and are readily constructedand adusted.

. Obviously, other details of construction may be varied withoutdeparting from the spirit of the invention and I do not care to limitmyself to any particular form or ar rangement of parts.

lVhat I claim as my invention is 1.-A convertible'cycle motor comprisinga compression chamber, a crank shaf Il ur naled therein, a cylinderhavingan air 1nletoortconnected with said chamber, and

an ex ports, a cam shaft operated by the crankshaft, a two-part cam onthe shaft, one part havlng a smgle lifting point, and the other austport, a' piston controllnig-said part having two lifting points, avaporizing valve opening into the explosion end of the cylinder, apump-fo-rforcing liquidfnel through said 'valve, a member operable byeither part of said cam to impart a stroke to the pump during theup-stroke of the piston once or twice during each revolution of the camshaft, and meansfor'movin'g either part of thecamj into engagement withsaid pump-operating memben. i I 2. The combination in a two-cycleengine, of a compression chamber, a. crank shaft our naledtherein, acylinder having aIRaIr-inlet port connected with said chamber,-.and

an exhaust port, and a piston controlling said ports, with a vaporizingvalve discharging into the explosion-end .ofthe cylinder, a" fuel pumpdischarging intosaid valve, a cam shaft operated by the crank shaftfalever for operating the pu'mp, a camw on the cam shaft adapted to imparta stroke to said lever during .the-up-stroke of' the piston either onceor'twice during each revolution of the cam shaft, and means for shiftingthe cam into either said single or ,double engagement with the lever.

3. :In a two-cycle motor, with a compression chamber, a crank shaftprovided therein, a cylinder havin an air inlet port connected with saidcham er, and, an exhaust port, and a piston controlling the ports of thecylinder, of a cam shaft exterior to the compression-chamber andoperatively connected to the main shaft, a fuel pump comprising aplunger reciprocable transversely of the cam shaft, a-lever -articulatedto the plunger ,and oscillatable transversely of the cam shaft, acamshiftable longitudinally of the shaft and provided with two cam facesone of which is adapted to momentarily depress the lever once duringeach revolution of the cam shaft, and the other of which is adapted tomomentarily de press the lever twice during each revolution of the saidshaft, a stop oscillatable in the path of the lever and adapted to varythe stroke thereof, and a lever adapted to shift the cam on the shaft.

the combinatioirmammal! der of a conventional two-cycle compres-' sionengine during either each lip-stroke or during alternate l p-strokes ofthe piston,

said means comprising a vaporizing valve,

discharging into the explosion end of the. motor, a jet nozzle in saidvalve discharging into the cylinder, an air pasage through thevalvendapted to be connected toa supply of compressed air,

a fuel-duct opening into 'said passage,-

a spring-pressed closure controlling the air passage and also said fuelduct, a

of the cam shaft, a-lever for operating the pump adapted to beoscillated by the cam, andxmeans for; shifting the cam to operate thelever either once ortwice ,during each revolution of the cam shaft-.

5. Means for supplying fuel to the cyl-f inder of a two-cycle engineduring either each up-stroke or during alternate lip-strokes of thepiston, comprising a vaporizing valve discharging into the explosionendof the motor, a jet nozzle in said valve discharging into thecylinder,an airpassage through the valve adapted to {be connected to a supply ofcompressed air, a spring-pressed closure simultaneouslycontrolling .theair passage and said fuel duct, a fuel-pump, a pipe connecting theoutlet of the pump with the fuel duct of the valve, a plungerreciprocable in the pump, a cam shaft operated by the motor at half themotor speed, a cam reciprocable"on the shaft' a nd provided with asingle and a double acting face, a lever for operating the plungeradapted to be depressed by the cam, means ior moving the cam to. operateeither singly or doubly on the plunger-lever, and a stop limiting thereturn throw of the plungerlever, t v p Intestnnony whereof I aflix mysignature I in presenceof two witnesses.

' LAWRENCE S. NASH.

Witnesses:

'C. 1%. Summer,

O'rro F. BARTHEL.

